Planetary type surfacing machine



25, E933. H. s.. MYERS wg PLANETARY TYPE SURFAGING MACHINE Filed May 28,1932 3 Sheets-Sheet 2 Inventor ger/yl /fyers f1 Homey July 25, 1933 H.l.. MYERS 1,919,389

PLANETARY TYPE SURFACING MACHINE Filed May 28, 1932 3 Sheets-Sheet 5Invcnlor ra/fly l. Myers IH] ff L if j By j] llo me y Patented July '25,1933 release L. MYERS, OF TOLEDO, OHIO, i

ssrenon To rnnnnnnrcan'rroon sUREAoING MCI-IINE COMEANY, OF TOLEDO,OHIO, CORPORATION 0F OHIO Panni-'arena Tarn sonni-'lerne MassimaApplication filed May 28,

cations will disclose the fact that the machine herein claimed is alsoof the multiple disc ensemble planetary type. In other words, themachine comiirises a portable truck supported carriage which includes aperpendicular motor driven shaft for operating a horizontally disposedrevoluble head which revolves on a predetermined fixed center, said headcarrying a multiplicity of co-relat-ed duplicate companion surfacerubbing or abrading units rotatableA on their individual axes.Incidentally this planetary type of heavy dutymachine for floor work ofthe kind specified is not new in the art or the trade.

The purpose of the present invention' is to provide the trade with astructurally improved and materially refined machine characterized by arevoluble self-levelling head having the distinguishable rotarysurfacing units and a )special power transmission means for said unitslocated in the confinesot the head, thereby providing an arrangementwhich is calculated to better fulfill the equirements of a machine of'this kind while at the same time minimizing lubrication.

This typefof machine,lit is submitted, is ideal touse for rubbing inthemastic and polishing the floor on the final finishing operation, It issuch in construction as to uni- :tormly surface high and low spots,eliminate an appreciable amount, of labor usually expended in accuratelylevelling or smoothing up the floor when laying the terrazzo.

The invention, as willbecome apparent 1932. Serial Nm 614,182.

from the drawings and description, compre- Y bends the provision of athoroughly practical up-to-date construction notable in particular as anappreciable addition to the prior art in that it includes an unequalledstyle and type of planetary abrading'unit drive believed to be anachievement inthe building of this particular variety of machine.

Briefly stated the'imin'ov-ed machine comprises a suitable wheelsupported or portable support which yincludes a verticalstationary guidefor aco-operating perpendicular drive shaft appropriately mounted in theguide. On the ,drive shaftis a revoluble headand between the head andshaft is aillexibleoperating connection which is such as to permit thehead' to be substantially self- Y levelling to compensate forirregularities in th'esurface of the licor.`

A plurality of individually rotatable surface conditioning units aremounted for rotation on the marginal.v portion of the head so that whilethe head revolves around a fixed loenterjthel desired planetary -rotarymotion is imparted to the units.

' The principalv novelty resides in an arrangement of the aforesaid-typewherein the headis of hollow construction to serve as a housing forv theplanetary drive which comprises a-centrally disposed fixed pulley orequivalent operating member, which'operates in conjunction with -alinedsupple/men'tary pulleys,v all of said pulleys being arranged in a commonplane to accommodate a double V-type belt co-operating with the liXedpulley in such a manner as to rotate the supplemental pulleys ing. fOther features and .advantages of the invention will become more readilyapparent from the following description and drawings. ,v

In the. accompanying illustrative drawings: v l y Figure, 1 is a view ofthe improved machine showing a fragmentary portion of the f portablesupport which, in practice is provided withf an electric motor drive(not when Vthe head is revolvshown), the improved planetary device beingshown in elevation.

Figure 2 is a horizontal sectional view of the planetary device per seas depicted in Figure 1.

Figure 3 is an enlarged detail sectional and elevational view taken onthe plane of the line 3 3 of Figure 2.

Figure 4 is a plan viewV of the revoluble head with the cover plateremoved to show the internal details.

Figure 5 is a horizontal sectional view taken on the plane of the line5-5 'of F igure 3.

Figure 6 is a top plan view of the primary or main friction drivepulley.

Figure 7 is a bottom plan View of an anchoring or attaching spider.

Figure 8 is an enlarged plan view of the driven shaft.

Figure 9 is a cross section taken on the plane of the line 9-9 ofFigure3.

lReferring now to the preferred embodiment of the invention asexemplified in the drawings it will be observed that the numeral 10y inFigure 1 designates a fragmentary portion of a part of a conventionalmachine hereinafter referred to asa portable support. In actual practicethis is a major part of a wheeled Atruck supported casing carrying anelectric motor (not shown) which motor drives a sprocket chain (notshown) trained over the sprocket wheel 11, said chain operating in theshield 12. Y

Through the medium of appropriate gearing (not shown) located in theVcasing 10 the perpendicular drive shaft 13 is operatednlt will benoticed in Figure 1'that this shaft ext-ends down through a verticaltubular fixed guide 14 having an appropriateiend thrust bearing 15. rThenumeral 16 merely designates va conventional apron or guard, all of theaforesaid part-s being old in the trade and t-he art.'

The revoluble head in F igure' 1 is designated as a unit by the numeral17. As shown in Figure 3 however it will be observed that the head isactually in the form of a hollow casing of general triangularconfigura-Y tion in top plan View. The lower section 18 may bedesignated as ythe body portion and theY top section 19 as a removablecover. The cover is bolted vor otherwise secured Vto the body asrepresented in the drawings and is provided `with upstanding portions 'l2O which serve as sockets toaccommodate the roller bearing assembly 21.f

It will be noticed that the centralportion of the cover plate isprovided with an opening 22. Disposed in alinement with the drive shaft13 is a relatively short driven shaft 23 which is keyed to the body 18of the head. This shaft 23 is provided at its upper end with a sphericalhead 24 having opposed ke'rfs or notches 25 constituting keyways forreception of the keys 26 mounted rigidly in the socket 27 on the lowerend of the drive shaft 13. This arrangement serv-es to couple the shafts13 and 23 together and to provide the requisite universal or ball andjoint cong I nection which allows the head 17 to be rcvolved but at thesame time self-levelling.

The numeral 28 designates the main plane* tary drive pulley surroundingthe driven shaft 23. The pulley is provided with radial'arms 29terminating in heads 30 secured by bolts 31 to the thcrmoid couplingannulus or ring 32. This ring is located between the guide 14 and thehead being exteriorly arranged with respect to the head. Moreover, thearms 29 of the pulley extend Ythrough the opening 22 in the head and areconnected to the ring 32 at circumferentially spaced points.

The numeral 33 designates what may be conveniently referred to as aspider, this being rigidly bolted to the lower end of the guide 24andhaving circumferentially spaced arms 34 fastened by bolts 35 to theiexible driving ring 32 at points between the boltconnections 31. Byfastening the spider rigidly to the stationary guide 14 and connectingit to the pulley through `the medium of the ring 32 and arm 29, thepulley is support-ed in a substantially horizontalplane and preventedfrom rotation. This provides the requisite flexible yconnection betweenthe pulley and guide 14 so that the pulley may remain in a substantiallyeven plane and VArock' with the head 17 as a complement-al part.

The rubbing or abrading devices or units are individually denoted by thenumerals 36 and these may beV of any appropriate construction. prises astub shaft 37 mounted in the bearings 21 and additional bearings 38. Aback* ing plate 39 is attached to the shaft and constructed toaccommodate the abrading blocks or stones 40.

' Sleeves 41 surround the stub shafts 37and are keyed thereto, eachsleeve being formed with a supplemental pulley 42 in alinement with themain pulley 28.

Attention is now invited to Figure 4 wherein the pulley assembly isshown completely. lAs vseen here, the numeral 43 designates a trackingbeltofdouble V-shaped form having its smaller flight 44 trained overapproxt mately one-half'of Athe Pulley 28 and having its outer largerflight 45 trained over the small or supplemental pulleys 42.

It will be noticed that the belt is substan* tially diamond-shaped incrosssection and that one vtracking edge thereof co-operates with thepulley 28 while the opposed tracking edge co-operates with the pulleys42.

The gist of the invention is that the revolubie head 17 is inthe form ofa hollow casingv which houses the liexible belt and l1' As here showneach unit compulley arrangement. f desire to mention however thatalthough I have shown pulleys and adriving beltcio-operating,frictionally with the pulleys an equivalent flexible drivesuch as a chain and sprocket drive may well be substituted in actualpractice.

` To avoid lubrication however it is believed that the belt arrangementis superior. Ain'- other essential point of merit is that by providing acasing-like head, free rotatiugbcarings may be supplied for the stubshaft 37 yof the individual rotary unit 36. Moreover, the vemployment ofa sectional casing head facili" tates assembling and affords protectivemeans for' the belt and pulleys. Then too, the flexible operatingconnection between the shafts 13 and 23 is important in thatitnprovidesthe requisite self-levelling feature of the headconstruction. Further, the flexible connecting web or ring cooperatingwith the stationary spider 33 and the pulley 28 for holding the pulleystationary is important, particularly so in that the connecting boltsbetween 'd parts are arranged exteriorly of the head to permit access tobe had thereto. Finally, the diamond-shaped belt is reversible andprovi- .a positive drive between the stationary pulleyv 2S and thecomplemental rotary pulleys l2 in order to practical planetary action.

It is thought that the escrotion taken in connection with the drawingswill enable a clear understanding1 of the invention to be had.Therefore, a more lengthy description is dee red unnecessary.

lYhile the preferred embodiment of the invention `nas been show anddescribed, it is to be understood that minor changes com# ing Withinthe` field of invention claimed may beresorted to if desiree.

I claim:

ll. In a machine of the class described, a. fixed guide, a poweractuated drive shaft mounted for rotation in said O'uidej a revolublehead, a. pluralityv of rotary surfacing units mounted on said head, adriven shaft Yin alinement with said drive shaft a universal jointsecuring said shafts together for simultaneous rotation, said drivenshaft being keyed to said head to revolve the head, a flexible annularweb, means fixedly securing said web to the guide, the web beinginterposed between the head and guide, a fixed friction drive membersurrounding said driven shaft and connected with said web, and operatingmeans for said rotary unit coe operable with said xen driving member.

2. in a machine of the class described, a vertical fixed guide, aperpendicular motor actuated drive shaft mounted for rotation in saidguide, a hollow casing-like revoluble head, a driven shaft keyedcentrally to said head and disposed in alinement with said frstnamedshaft, a universal joint connecti ing said shafts togetherto permit saidhead to be substantially self-levelling and to compensate forirregularities in surface'being treated, va plurality of rotary surfaceabrading units mounted for rotation on said head, l

operating means for said units, a spider fixed to said guide, a flexiblering interposed between the spider and upper face of said head, saidspider being .rigidlysecured to said flexible ring,.andvmeanssurrounding said driven shaft and secured to said ring,

whereby 'to steady and substantially control` rounding said drivenshaft, a spider secured to said guide, a flexible coupling ringinterposed between the head and spider, said spider being attached tosaid ring, the aforesaid pulley having arms also attachd to said ring,and operating inea-ns connected with said surfacing units and'jpulley.

p 4. `A machine of the class described com# prising a fixed guide, amain drivesshaft mounted for rotationin said guide, a hollow revolublehead, a centrally disposed driven shaft keyed tosaid head and joinedtosaid first-named shaft through the medium of a universal joint, arelatively stationary pulley surroundingV said .driven shaft, a spidersecuredto said guide, a flexible coupling ringinterposed between theheadand spider, said spider being attachedfto said ring, the aforesaidpulley having arms attached to said ring, said head being provided withcircumferentially spaced bearin s, a plurality of individually rotatableoor abrading units mounted for rotation in said bearings, supplementaldrive pulleys for said units, said pulleys being located in said head,and a belt trained over the stationary pulley and said supplementalpulleys to provide for ro- Vtation of said units while said head isbeing revolved.

y 5. A machine of the class described comprising a fixed guide, a maindrive shaft mounted for rotation in said guide, a hollow revoluble head,a centrally disposed driven shaft keyed to said head `and lioined tosaidV first-named shaft through themedium of a universal joint, arelatively stationary pulley surrounding said driven shaft, aspidersecured to said guide, a flexibley coupling ring interposed between thehead and spider, said spider being attached to said ring, the aforesaidpulley having arms attached to said ring, said head being provided withcircumk ferentially spaced bearings, a pluralityl of individuallyrotatable floor abrading units mounted for rotation in said bearings,supplemental Vdrive pulleys for said units, said pulleys being locatedin said head, and a belt trained over the stationary pulley and saidsupplemental pulleys to provide for rotation of said units while saidhead is being revolved, said belt being doubled upon itself intodouble-V formation one V-shaped portion thereof co-operating with thexed pulley and the remaining V-shaped portion thereof co-opei'ating withthe supplemental drive pulleys. Y

6. A machine of the classdescribed comprising a vertical fixed guide, apower actuated drive shaft mounted for rotation in said guide, a hollowcasing-like revoluble head, a driven shaft in said head rigidly attachedto the central portion thereof and disposed in alinement with saidfirst-named shaft, a universal joint connecting said shafts together foroperation in unison, a relatively fixed pulley arranged within theconfines of said head and surrounding said driven shaft, the top of saidhead being formed with a central opening alined with said guide, saidpulley having radial arms extending upwardly through and beyond saidopening, a spider plate fastened securely to said fixed guide andprovided with radial arms, a flexible connecting ring, said spider armsand pulley arms being bolted to said ringv in alternating order, aplurality of surfacing units mounted for rotation in said head, Aand amotion transmitting belt operatively connected with said units andpulley.`

7 A machine of the class described comprising a vertical fixed guide, apower actuated drive shaft mounted for rotation in said guide, a hollowrevoluble head, a driven shaft rigidly attached to the central Portionof said head and disposed in alinement with said first-named shaft, auniversal joint connecting said shafts together for operation in unison,a relatively fixed main pulley arvertical circumferentially spacedbearings, a

plurality of abrading units mounted for individual rotation in saidbearings and provided with supplemental pulleys arranged in a planesubstantially even with said fixed main pulley, and a friction drivingbelt trained over said pulleys.

8. As a new article of manufacture, a sectional hollow revoluble headprovided with a central iixedly keyed driven shaft, the upper coversection of said head being centrally apertured, a main pulleysurrounding said driven shaft and provided with a plurality ofcircumferentially spaced radial arms extending upwardly through andbeyond the aperture in said cover section, said head being provided withcircumferentially spaced bearings, a plurality of individually rotatablesurface treating units having stub shafts mounted for rotation in saidbearings, a plurality of individual supplemental pulleys attached tosaid stub shaft, and a single bolt trained over all of said pulleys.

HARRY L. MYERS.

